Research On Diagnosis Of Engine Fault Based On Data Flow

With the global attention on environmental protection,the on-board diagnostic system has become the standard configuration of the vehicle.in order to better monitor the working conditions of the engine and the exhaust emissions vehicles are required to install on-board diagnostic systems.With the development of industrial automation and the improvement of the complexity of automobile design,automobile engine has become a highly integrated automotive power output system.It's more and more difficult to find out the reason of failure in the process of maintenance and troubleshooting,and restore the engine to its original state.At present,automobile manufacturers,automotive research institutions and the masses owners face the common problem.The engine ignition and injection failure in the work process can cause the engine cylinder misfire.Misfire will not oily decrease the work efficiency of the engine,increase fuel consumption,but also produce emissions of non-compliance,which can cause air pollution.This paper is the analysis of distinguishing single cylinder misfire and fault injection system,by collecting a large number of references early,and grasping the status quo at home and abroad while using data flow to solve the engine fault.In this paper,the main factors of the ignition and fuel injection will be analyzed first,and then the data flow through the experiment would be analyzed and summarized by wavelet,so the general conclusions will be made.